blob: eef03e19c19cdd9a1f474ff16aaf96fde5d647fb (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
/*
* Copyright (C) 2015-2016 Daniel Schaal <daniel@schaal.email>
*
* This file is part of OCReader.
*
* OCReader is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* OCReader is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OCReader. If not, see <http://www.gnu.org/licenses/>.
*
*/
package email.schaal.ocreader
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.webkit.WebView
import androidx.fragment.app.Fragment
import androidx.fragment.app.viewModels
import androidx.lifecycle.SavedStateHandle
import androidx.lifecycle.ViewModel
import email.schaal.ocreader.database.model.Item
import email.schaal.ocreader.databinding.FragmentItemPagerBinding
internal class SavedStateViewModel(private val state: SavedStateHandle): ViewModel() {
companion object {
private const val POSITION: String = "POSITION"
}
var position: Float
set(value) { state.set(POSITION, value)}
get() { return state.get(POSITION) ?: 0f }
}
/**
* Fragment to display a single feed item using a WebView.
*/
class ItemPageFragment : Fragment() {
private lateinit var binding: FragmentItemPagerBinding
private val vm: SavedStateViewModel by viewModels()
override fun onStart() {
super.onStart()
binding.webView.apply {
setItem(arguments?.getParcelable(ARG_ITEM))
if (vm.position > 0f) {
postVisualStateCallback(0, object : WebView.VisualStateCallback() {
override fun onComplete(requestId: Long) {
scrollY = (contentHeight * resources.displayMetrics.density * vm.position).toInt()
}
})
}
}
}
override fun onPause() {
super.onPause()
binding.webView.onPause()
}
override fun onResume() {
binding.webView.onResume()
super.onResume()
}
override fun onDestroy() {
binding.webView.destroy()
super.onDestroy()
}
override fun onDestroyView() {
binding.webView.settings.javaScriptEnabled = false
super.onDestroyView()
}
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
binding = FragmentItemPagerBinding.inflate(inflater, container, false)
return binding.root
}
override fun onSaveInstanceState(outState: Bundle) {
super.onSaveInstanceState(outState)
binding.webView.apply {
vm.position = scrollY / (contentHeight * resources.displayMetrics.density)
}
}
companion object {
private const val ARG_ITEM = "ARG_ITEM"
fun newInstance(item: Item?): ItemPageFragment {
return ItemPageFragment().apply {
arguments = Bundle().apply {
putParcelable(ARG_ITEM, item)
}
}
}
}
}
|
